.new-category {
    background-image: url(images/new-category.gif);
    height: 16px;
    width: 16px;
}

.edit-category {
    background-image: url(images/edit-category.gif);
    height: 16px;
    width: 16px;
}

.delete-category {
    background-image: url(images/delete-category.gif);
    height: 16px;
    width: 16px;
}

.refresh-category {
    background-image: url(images/refresh-category.gif);
    height: 16px;
    width: 16px;
}